Huawei NetEngine 8000 F User Manual

Optical
Module Type
Maximum
Average
Transmit
Optical
Power
Minimum
Average
Transmit
Optical
Power
Damaged
Optical
Power
Threshold at
the Receive
End
Description
50GBASE-ER 6.6 0.4 -2.4 The damaged
optical power
threshold is
9dBm lower
than the
maximum
average
transmit
optical power
and 2.8dBm
lower than
the minimum
average
transmit
optical power,
posing high
self-loop risks.
In this case,
an optical
attenuator
must be
congured for
self-loop.
For applications of the 50 Gbps optical module supporting a distance of 40 km:
1. To ensure that the optical module runs stably for a long time, adjust the
receive optical power of the optical module to a value lower than -4 dB.
According to the IEEE 802.3 standard, if the receive optical power of the
optical module exceeds -2.3 dB, the optical module may be permanently
damaged.
2. Before connecting to the optical module, use an optical power meter to
measure the receive optical power (P). If P is less than -4 dB, the optical
module can be directly connected. If P is greater than -4 dB, add an optical
attenuator at the receive end to ensure that the receive optical power is less
than -4 dB. Alternatively, add an optical attenuator (no less than 10 dB is
recommended) before the interconnection, and then adjust the optical
attenuator based on the site requirements to prevent the optical module from
being damaged.
3. If a loopback occurs on the pigtail of the optical module or the optical
module is connected for a short distance, an optical attenuator must be
added. It is recommended that the optical attenuator be no less than 10 dB.
HUAWEI NetEngine 8000 F
Hardware Guide 4 Hardware Installation and Parts Replacement
Issue 05 (2023-03-31) Copyright © Huawei Technologies Co., Ltd. 428

Huawei NetEngine 8000 F Specifications

General

Brand	Huawei
Model	NetEngine 8000 F
Category	Network Router
Language	English